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changed the statement 2022-01-23 9cee969
Try to use L/K notation for field extensions

We could also try to consistenly use "field extension" and not just
"extension" and consistently use "ring extension", etc.
assigned tag 04KW 2010-05-23 7a316a7
Tags: added new tags
created statement with label lemma-inverse-image-irreducible in varieties.tex 2010-05-20 906feb1
Groupoids on field

	We started adding some material on groupoid schemes (U, R, s, t,
	c) where U is the spectrum of a field. This is quite similar to
	the material on group schemes over a field, but a bit more
	techinical. The goal is to show that dim(R) = dim(G) for such a
	groupoid scheme provided that s and t are locally of finite
	type. Coming up...